Edge joint for doors,windows and other building units



1970 B. A. LUNDGREN 3,

EDGE JOINT FOR DOORS, WINDOWS AND OTHER BUILDING UNITS Filed May 1, 1968 FJ 6 an g INVENTOR BLUYGT A/(E LU/VDGRE/V ATTORNEYS United States Patent 3,491,501 EDGE JOINT FOR DOORS, WINDOWS AND OTHER BUILDING UNITS Bengt A. Lundgren, 8 Slattervagen, Tyreso, Sweden Filed May 1, 1968, Ser. No. 725,793

Int. Cl. E04c 2/38; E06b 3/00 US. Cl. 52-656 3 Claims ABSTRACT OF THE DISCLOSURE In an edge joint for doors, windows and the like of the kind, which comprise a'metal frame, one frame side in its end portions have longitudinal lock tongues, which are intended to be received in slots, perpendicular to the length direction of a frame side, perpendicular to said first mentioned side. As the distance between the inner edges of the first mentioned side and its lock tongues corresponds to the distance between the end portion of the other side and its slots and the width of the slots corresponds to the thickness of the lock tongues a rigid connection between the sides is obtained purely by assembling the sides.

This invention refers to an edge joint for doors, windows and other building units, which comprise a rectangular frame, made from metal profiles.

The main object of the invention is to provide a simple and rigid edge joint between the metal profiles while maintaining the right-angled relationship between the same.

To obtain edge joints of the kind referred to, it has been common practice to provide screws, rivets or the like as well as soldering or welding. As the surfaces of the profiles are often finished before they are to be connected, the method, hitherto known as disadvantageous in that the surfaces are considerably deformed. Further, it is in most instances necessary to undertake the connection in special fixtures, whereupon the connected profiles have to be subsequently treated manually or by means of grinding tools or the like. As a consequence the work had to be carried out in a workshop whereupon the products in assembled condition had to be transported to the place where they were to be used. The transportation was rather costly owing to the bulkiness of the items.

Since long ago there has been a demand for an edge joint for metal profiles, which may be carried out on a building yard or the like and which does not necessitate a subsequent treatment of the assembled edge joint. The requirements referred to are fully met by the edge joint according to the present invention. The characteristics of the invention will appear from the attached claims. Reference is made to the accompanying drawing, in which a preferred embodiment of the invention is shown.

FIG. 1 shows in perspective a portion of the upper, horizontal side of the metal frame and a corresponding portion of the left vertical side of the frame.

FIG. 2 shows a plan view of the same details in assembled condition.

The building unit, referred to, consists of a frame, made from metal profiles. In the following, only two of the sides will be described, but it is obvious that the construction of the remaining two sides and their connection is quite analogous to the construction and connection of the two sides, referred to. The upper, horizontal side of the frame is designated 1. It consists of aprofile, which is mainly rectangular. The upper side 2 'is plane while the under side 3, however, is shaped to a fitting, for holding a glassplate or the like. In the front and rear sides 4a, 4b of the profile are adapter slots 5a, 5b, which extend parallel to the edge of the side 1 and have such a depth, that they See also penetrate into the upper and lower side 2, 3 of the profile.

, The left, vertical frame side, which is shown in FIG. 1, is designated 6 and is mainly U-shaped. By cutting off a part of the shanks 7a, 7b, there are constitutedtwo lock tongues 8a, 8b, which extend up to the fitting 15. The

- distance between these lock tongues 8a, 8b and the nearest inner edges 9a, 9b of the profile closely corresponds to the distance between the slots 5a, 5b" and the end edge of the profile 1. It will thus be obvious that the frame sides 1 and 6 may be connected to a rigid unit by displacing the side 6 with its lock tongues into engagement with the slots 5a, 5b of side 1 according to FIG. 1. Owing to the dimension of the details the end edge of side 1 will then be tightly pressed against the edges 9a, 9b and when the sides have been completely assembled, i.e. when the upper portions of the sides are mainly in the same plane, a very rigid connection has been obtained. In order to further prevent any undesired displacement of the sides relative to each other, side 6 is on its inner side knurled or serrated by means of small rivets 10, which are deformed when the sides are brought together thus serving to further secure the sides relative to each other. When the sides are to be permanently connected to each other it is suflicient to stave up the upper edges of the lock tongues 8a, 8b, which may be done by an easy stroke of a hammer. It is of course also possible to use spotwelding or the like.

As pointed out, the frameaccording to FIGS. 1 and 2 is intended to serve as a guide for a glass-plate or the like. For this purpose, at least the horizontal sides of the frame are each provided with a U-formed portion 11 the shanks of which are provided with guide rails 12a, 12b, each provided with grooves 13a, 13b, for rubber mouldings, intended to resiliently hold the glass-plate. Thus, the glass-plate may move in its length direction as well as in the direction perpendicular thereto, while maintaining a sufficient guiding of the same.

The vertical side 6 may be correspondingly shaped for holding the glass-plate. This side is on its outer side provided with guides 14a, 14b intended to co-operate with other building elements. The shanks 8a, 8b of side 6 extend up to the upper edge of a fitting 15 for the glassplate. This upper edge serves, as already mentioned, as a stop limit for the downwards movement of the frame side 1 such that the lower portion 3 of said side 1 will rest against this upper portion while the sides 1 and 6 are in their assembled position.

The invention is not limited to the embodiment herein shown and described but may be modified within the scope of the appended claims.

What is claimed is:

1. An edge joint for doors, windows and similar building units, comprising a rectangular frame provided by metal profiles and which has two mutually parallel first sides and two second sides perpendicular to said first sides and connected to the same, the profile which constitutes the first side of the frame in its end portion has two locking tongues extending perpendicular to the door plane and in a direction towards each other and which extend in the length direction of said side and end in a stop member, said second horizontal frame side on a distance from its end, which corresponds to the distance between said tongues of said first side and the inner facing edges of said frame side, has two slots extending perpendicular to the length direction of said second side, the width of which closely corresponds to the thickness of said lock tongues characterized in that the length of said lock tongues corresponds to the total height of said second side and that the slots extend along the entire height of said second side including the lower as well as the upper flanges of said second side and the depth of I rivets:

said tongues" somewhat exceeds the width of the loclg tongues, whereby when sai d tfirstan d second frame sides,

said frame sides fareconnected, a permanent connection may be obtained by'staving up *Zthe ends of the lock tonguestwhich are'approximately flush with the upper surface of said second side in order to ;obtain a'rigid rectangular connection between said frame sides.

2, An edge joint as claimed in claim 1, wherein said profile, which con'stitutesthe first side of the frame, is on its inner side provided with a plurality of parallel 3. An edge joint as;clairned"in claim 1,' wherein said first frame side has a fitting for holding a glass plate or the like and that the upper edge'of said fitting constitutes the stop abutment'for the second frame side.

H References Cited 1 UNITED STATES PATENTS 2,601, 1 54 6/ 1952 Montgomery.

2,617,502 11/ 1952 Kessler. 2,918,108 12/ 1959 Sharp et a1. 3,070,197 12/1962 Musselman. 7 3,083,797 4/1963 Wergin.

KENNETH DOWNEY, Primary Examiner 

